Stefek, Ronny
Current rating: 1437
Record: 15-21
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 809 | Niren, Gary (1499) | Won 2-1 | +191467 |
| 2modern | 273 | Maynard, Rudy (1516) | Lost 0-2 | -171450 |
| 3modern | 1219 | Elliott, Kevin (1546) | Won 2-1 | +201470 |
| 4modern | 853 | Joosten, Geoffrey (1466) | Lost 0-2 | -181452 |
| 5modern | 859 | Melendrez, Aysha (1538) | Won 2-1 | +191471 |
| 6modern | 766 | Dick, Josh (1482) | Lost 1-2 | -181453 |
| 7modern | 2154 | Pawlik, Tyrus (1513) | Lost 1-2 | -161437 |
| top | average opponent: 1509record: 3-4 | new rating: 1437 | ||
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1441 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 66 | Eager, Nathan (1574) | Lost 1-2 | -151426 |
| 2sealed | 748 | Sakioka, Corbin (1462) | Lost 1-2 | -171409 |
| 3sealed | 1095 | Glende, Maxx (1464) | Won 2-0 | +191428 |
| 4sealed | 974 | Hollander, Matt (1469) | Won 2-0 | +181446 |
| 5sealed | 657 | Gee, David (1516) | Lost 0-2 | -161430 |
| 6sealed | 741 | Harper, Jonathan (1464) | Won 2-1 | +181448 |
| top | average opponent: 1491record: 3-3 | new rating: 1448 | ||
| Grand Prix Las Vegas 2017 (legacy) (legacy) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 472 | Mei, Tony (1418) | Won 2-1 | +171467 |
| 2legacy | 480 | Adams, Robert (1483) | Won 2-0 | +191486 |
| 3legacy | 630 | Cusick, Brian (1583) | Lost 0-2 | -171469 |
| 4legacy | 672 | Holt, Andrew (1623) | Lost 0-2 | -151454 |
| 5legacy | 643 | Pritt, Matthew (1519) | Won 2-1 | +191473 |
| 6legacy | 677 | Salazar, Anthony (1509) | Won 2-0 | +191492 |
| 7legacy | 495 | Briggs, Benjamin (1709) | Lost 0-2 | -141478 |
| 8legacy | 556 | Weinmann, Jake (1485) | Lost 1-2 | -181460 |
| 9legacy | 532 | Wysocki, Eric (1431) | Lost 0-2 | -191441 |
| top | average opponent: 1529record: 4-5 | new rating: 1441 | ||
| Grand Prix Louisville 2017 (legacy) | starting rating: 1458 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 293 | Kosmel, Kyle (1514) | Lost 1-2 | -171441 |
| 4legacy | 599 | Dains, Dillon (1511) | Lost 1-2 | -161425 |
| 5legacy | 808 | Benson, Jonathan (1874) | Lost 1-2 | -111414 |
| 6legacy | 861 | Cook, Austin (1402) | Lost 1-2 | -181396 |
| 7legacy | 857 | Hughes, Eric (1370) | Won 2-1 | +171413 |
| 8legacy | 761 | Bailey, Joni (1421) | Won 2-1 | +191432 |
| 9legacy | 706 | Woods, Richard (1443) | Won 2-0 | +181450 |
| top | average opponent: 1505record: 3-4 | new rating: 1450 | ||
| Grand Prix Dallas-Fort Worth 2015 (ORI limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 119 | Emdy, Ian (1500) | Won 2-0 | +181518 |
| 2sealed | 216 | Almeida, Anthony (1518) | Lost 1-2 | -181500 |
| 3sealed | 441 | Smith, Christopher (1664) | Lost 0-2 | -151485 |
| 4sealed | 628 | Smart, Jason (1535) | Won 2-0 | +191504 |
| 5sealed | 574 | Segura, Jacob (1722) | Lost 0-2 | -141490 |
| 6sealed | 503 | Hendrickson, Mark (1752) | Lost 1-2 | -141476 |
| 7sealed | 422 | Gay, Mary (1464) | Lost 0-2 | -181458 |
| top | average opponent: 1594record: 2-5 | new rating: 1458 | ||